public class Testargs {
    public static void main(String[]args){
            int tmp = Integer.parseInt(args[0]);           
        }
        System.out.println(Digui.digui(tmp));
    }
private class Digui{
    int digui(int n){
    if (n=0)
     return 1;
    else
     return(n + digui(n-1)); 
}
}


